The context switch cost is still reasonably high. However, since you're in "idle/wait" status, you can as well use that to perform such a costly context switch

The context switch cost is still reasonably high. However, since you're in "idle/wait" status, you can as well use that to perform such a costly context switch and cleanup some. If you however e.g. had to stir something every minute or more, then the context switch would be too expensive, even tho you're still "idle/wait" most of the time. I start cleaning/tidying up myself when cooking, but only "easy to clean" stuff, because more than once I have been burned by focusing too long on cleaning something more difficult to clean (or rather my food was burned a little).